package Io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo03 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("obj.pdf");
        FileOutputStream fos = new FileOutputStream("obj01.pdf");
        byte[] data = new byte[1024*10];//10kb
        int len; //每次实际读取到的字节数
        long start = System.currentTimeMillis();
        while ((len = fis.read(data))!=-1){
            fos.write(data,0,len);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕！耗时："+(end-start)+"ms");

    }
}
